To protect themselves in dealing with the police, some NFL players have taken aim at officers during traffic stops — with smartphones.

After getting pulled over, they activated their phone's video function and started filming.

"I've actually had cops let me go after they found out that I was recording them," Tennessee Titans wide receiver Kenny Britt said.

Britt, who is black, says he does it because he thinks authorities sometimes engage in racial profiling. He has been arrested or faced charges from at least four traffic stops since 2010, resulting in one acquittal in a drunken-driving case, one dismissed case and two paid fines.

"One time (when police) saw me recording them, he started asking me questions that had nothing to do with the stop," Britt said. "Another time the police told me to take the keys out of the car with my wife in the car. They said I was speeding, and then all of a sudden six cop cars came for this one traffic stop. And I had done nothing wrong."

Rich Roberts, a spokesman for the International Union of Police Associations, says any recording of a traffic stop doesn't tell the entire story because it probably doesn't show how the suspect responded to the officer. Roberts questions if suspects film traffic stops for hostile purposes instead of to prove their innocence.